Activity 75 Follow-up:. Major Concepts The motion of an object can be described by its position, direction of motion, and speed. Motion can be measured and represented on a graph Average speed =. Total distance Total time. Analysis:.
A change in slope indicates a change in the distance traveled in a given time, which is defined as speed. It can also show you a change in direction.
Teasha started faster than Josh did. I know this because I looked at the graphs, and Teasha’s has a steeper slope than Josh’s. Her slope for the first segment is 0.5 mi/min, and Josh’s is 0.4 mi/min. Since Josh’s slope is less than Teasha’s, he wasn’t moving as fast.
Josh turned around 6 minutes after he left home—5 minutes traveling 2 miles and 1 minute stopped. You know this because from Minute 6 to Minute 10, the slope of the graph is negative (downward), which indicates a reversal in the direction of motion. With a positive (upwards) slope, the distance away from the starting point increases with time. With a negative slope, distance from the starting point decreases with time, which means that the car is getting closer, or traveling back toward, the starting point.
a. Graph 2
b. Graph 4
c. Graph 1
d. Graph 3
Graph A shows an object accelerating. This is because it has a curved line that shows increasing steepness in slope as time increases. Graph B, in contrast, has a constant slope so it shows constant speed. Both graphs show motion in a straight line.
Title: Speed and Collisions
Problem: Does vehicle speed affect the forces involved in a collision?
Hypothesis: If _______ increases, then ____________________________.
Increasing speed increases force!
Which are dependent and independent?
The cart decelerates as it come to a stop. It also rebounded backwards in some cases
Force of block on cart
Force of cart on block
Cart and block
slows cart down
speeds block up